Metallic oxides turns red lithmus paper:-

Alkali metals burn in air to form oxides, peroxides and superoxides. Lithium burns in moist air to form normal oxide as the major product. Some lithium nitride is also formed if nitrogen is present. Sodium loses lustre and forms both normal oxide and peroxide, the peroxide being the major product. Rest of all alkali metals form peroxides. All metals can be forced to form oxides, peroxides and superoxides by dissolving in liquid ammonia and bubbling appropriate amount of O_(2) . Which among the following oxides turn red litmus paper blue :

Aqueous solution of which of the following oxides turns blue litmus red?

State whether following statement is true or false :- Nitric acid turns red lithmus blue.

Can dry hydrogen chloride gas turn a blue litmus paper red ?

An element E forms an oxide E_(2)O . An aqueous solution of E_(2)O turns red litmus paper blue. (a). What is the nature of the oxide E_(2)O ? (b). State whether element E is a metal or a non-metal. (c). Give one example of an element like E.